Tube-hoisting appliance for oil-wells.



PATENTED 'FEB. 25, 1908.

J. HOGUB.

TUBE HOISTING APPLIANCE FOR OIL WELLS.

vAIILIOA'I'ION FILED SEPT. 5. 1906.

JAMES HOGUE, OF BRADFORD, PENNSYLVANIA.

TUBE-HOISTING APPLIANCE FOR OIL-WELLS.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed September 5, 1906. Serial No. 333.364.

To all whom it may concern:

Be it known that I, JAMES HOGUE, a citizen of the United States,residing at Bradford, Pennsylvania, have invented certain new and usefulImprovements in Tube- Hoisting Appliances for Oil-VVells, of which thefollowing is a specification.

My invention relates to an apparatus for pulling the tubing out of oilwells.

It has been customary to employ a tubing line or cable made of hemp ropehaving the quality of stretching and thus relieving strain on thederrick and the machinery used for pulling the tubing. As the art is atpresent practiced, however, wire rope is employed which has no elasticquality or power to stretch and relieve the strain, and therefore whenthe apparatus starts to pull the tubing and the slack of the wire ropeis taken up, considerable strain is suddenly brought upon the derrickand the machinery, resulting in damage thereto.

It is the object of my invention to provide means for use in connectionwith a wire rope for pulling tubing from the well which will avoid theundesirable results mentioned above.

The invention consists of the features, combination and arrangement ofparts hereinafter described and particularly pointed out in the claims.

In the accompanying drawing-Figure 1 is a diagram of the parts used forpulling the tubing with my improvement applied thereto. Fig. 2 is adetail view of the device enlarged. Fig. 3 is a side elevation of Fig.2.

My invention is applied to the derrick and pulling appliances withoutmaking any changes therein. As is well known, at the top of the derricka crown pulley is j ournaled and over this the Wire rope passes from thehoisting drum or bull wheel arranged near the lower part of the derrick.After passing over this crown pulley as indicated at 1, in Fig. 1, thewire rope 2 passes downwardly through a pulley arranged near the lowerpart of the derrick, as at 3, and thence upwardly, being attached at itsupper end at a point adjacent the crown pulley. Heretofore when a hemprope was employed the upper end of the said rope was attached directlyto a crown block or beam 4 in which the crown pulley is j ournaled. Theuse of the hemp rope gave sufiicient elasticity or stretch to relievethe parts of strain when the bull wheel hoisted the rope 2, togetherwith the pulley block 3, which latter is, as is well known, connected bymeans of tubing elevators with the tubing to be lifted. This quality ofthe hemp rope was sufficient to prevent strain on the parts and damage.When a wire rope is employed, I attach the upper end of the wire rope toa stem 5 arranged to slide through a yoke 6 and through a cross piece 7carried by the said yoke. This stem has a forked lower end at 7 in whichfork the wire rope is secured by a bolt 8 and the upper end of the stemhas thereon a nut 9, between which and a cross piece 7 a spiral spring10 is arranged. The upper end of the yoke is pivotally secured at 11 tothe cross bar or crown block of the derrick, the parts being arrangedand combined so that the stem 5 will have yielding movements when unduestrain comes upon the wire rope, and thus the crown block at the top ofthe derrick and the hoisting machine will be relieved of strain at suchtime.

One effect of the spring as employed in my device is to take the slackout of the wire rope before it begins to take up its load and thisavoids the sudden jerk or strain which results from the use of a slackrope when the same becomes taut. plished by my device is that it takesthe twist out of the wire rope and avoids the necessity heretoforeexperienced of taking the wire rope down in order to get out the twist.It will be noticed in this connection that the stem 5 is free to rotateor swivel in its bearings in the cross piece 7 and the yoke 6. Thedevice also avoids slacking the elevators and giving the line a suddenjerk for the purpose of freeing the tubing from the collar after it hasbeen unscrewed as the tension of the spring is sufficient to lift thetubing out of the collar at this time.

It will be observed that the lower end of the spring bears upon thecross bar 7and that at the lower end of the yoke the second bar 6 isemployed which coacts with a projection or nut 12 on the stem at a pointbelow the spring to limit the downward movement of the stem and theparts are so arranged that these stops will contact with the lower crossbar before the spring can be subjected to such weight and pressure aswill tend to break the same.

I claim as my invention:

In combination in a tube hoisting appliance for oil wells, a frame, awire rope, and the connection between the wire rope and said frameconsisting of a yoke connected to Another result accomthe frame, a stemarranged to slide and also bar and limit the pressure of the stem on the10 turn in said yoke, a spring surrounding the spring, substantially asdescribed.

stern, a nut on the stem bearing on one end of In testimony whereof, Iaflix my signature the spring, the said yoke having a cross bar inpresence of two witnesses 5 upon which the other end. of the springbears JAMES HOGUE and through which the stem extends, and

having a second cross bar through which the Witnesses:

stem extends, and a limiting stop or nut on E. J. JONES,

the stem to contact with the second cross MARGARET A. LYNCH.

